According to Vodafone Australia testing for Android 5.0 Lollipop update for Xperia Z2 and Xperia Z3 models shows a Lollipop update in near future.
The update is expected to come out at some point during this month. So, there is a good chance that for branded handsets, the update is more likely ...
Xperia Z2 and Z3 Soon Will Get Lollipop Update